Search found 218 matches

by Mika Harju
Fri 11 Aug 23, 11:17
Forum: DF920 Rig/Sails
Topic: Boom gooseneck parts need replacing
Replies: 2
Views: 1791

Re: Boom gooseneck parts need replacing

That spar is originally weak, made from the wrong material, and poorly designed. I upgraded my DF1000R boom by welding a new one from stainless steel and extending the boom's E measurement by 100mm. This allowed me to fit a larger Square-Top mainsail onto my boat. Attached is an illustrative CAD 3D...
by Mika Harju
Sat 02 Jan 21, 10:52
Forum: DF800 Hull
Topic: Hinge Bolt replacements
Replies: 8
Views: 4451

I have done this project for both DF1000R and DF800SW. There was a LOT of problems with DF800 technical structure. Very bad workmanship by the manufacturer. I have quite good 3D CAD files and other documentation about the project. It took about 200h to replace all SW system mechanics, build a new ma...
by Mika Harju
Wed 18 Nov 20, 15:34
Forum: DF800 Hull
Topic: Damage to wing - bracket design change?
Replies: 3
Views: 3702

Re: Damage to wing - bracket design change?

That is a known weak point on all older DF. When the boat is heeling the ama's "turning table" is pushing towrds this weak point and it breaks down.

I suggest you to remove the stainless steel part and weld an extension there as is shown on DF920 photo.

Not a big task.
by Mika Harju
Tue 16 Jun 20, 9:11
Forum: Motor/Equipment/Electrics issues concerning all DFs
Topic: 280Ah Lithium LiFePO4 battery system upgrade for 1300e
Replies: 1
Views: 3752

280Ah Lithium LiFePO4 battery system upgrade for 1300e

I replaced the AGM batteries with Chinese LiFePO4 batteries, necessary control electronics and updated all electric supply system on 230VAC and 12VDC side. My plan was to engineer and build a system without any leading brands (Mastervolt, Victron etc.) to avoid the complicated and expensive solution...
by Mika Harju
Mon 15 Jun 20, 8:40
Forum: DF1000 Hull
Topic: Rain leak near mast
Replies: 18
Views: 17483

Re: Rain Leak Near Mast

Imho, the starboard factory worker ought to be fired ![/quote]
Same problem on both sides but this side was much worse. Maybe the QB workers switched jobs for a day? :oops:
by Mika Harju
Fri 12 Jun 20, 7:49
Forum: DF1000 Hull
Topic: Rain leak near mast
Replies: 18
Views: 17483

Re: Rain Leak Near Mast

Finally solved this problem on my DF1000R. The leak was at mast bulkhead and inner roof mold connection. QB has done this detail badly because they have painted the hidden part of the bulkhead with a thick layer of topcoat. At this area loads are big when sailing and all connections between structur...
by Mika Harju
Tue 19 May 20, 7:16
Forum: DF32 General Topics
Topic: 32ft Supreme...Dyneema for sprit bobstay
Replies: 2
Views: 4490

Re: 32ft Supreme...Dyneema for sprit bobstay

I've done this and replaced the steel wire with dyneema. The lower end fitting of the original stay jammed many times to the fixed fitting and it was difficult to get the bowsprit fully out. I made proper roundings to the lower fixed fitting with a small grinder. 10mm dyneema without cover and Brumm...
by Mika Harju
Tue 14 Apr 20, 12:12
Forum: DF1000 Rig/Sails
Topic: Genoa furling system jammed. Fixing instructions.
Replies: 18
Views: 23267

Re: The same problem

The upper swivel body is assembled by using glue to prevent it to opening. Use heat to melt the glue and if necessary you need to use plumber's tools to open it. You'll damage the surface then but there is no options if force is needed to open. I replaced the original Bartels system about 10 years a...
by Mika Harju
Sun 29 Mar 20, 9:50
Forum: DF1000 General Topics
Topic: DIY Anchor's chain Box
Replies: 1
Views: 4056

Re: DIY Anchor's chain Box

Looks really nice and professional.
by Mika Harju
Sun 29 Mar 20, 9:45
Forum: HULL issues concerning all DFs
Topic: Broken net rigging wire
Replies: 5
Views: 4157

Re: Broken net rigging wire

I have 6mm Dyneema too.
by Mika Harju
Thu 28 Nov 19, 9:45
Forum: Rig/Sail issues concerning all DFs
Topic: What is this parts in the Boom?
Replies: 14
Views: 7922

Hi Tuca
I am happy to help you. These DF's are quite different compared to monohulls if you're a newcomer.
As you can see I've made a 3D CAD model of mine so it is quite easy to present different details.
by Mika Harju
Thu 28 Nov 19, 9:37
Forum: Rig/Sail issues concerning all DFs
Topic: Boom topping lift
Replies: 1
Views: 2680

Re: Boom topping lift

Remove the boom top lift and adjust the Lazy-Jacks top pair to carry the boom. This works fine with my DF.
This allows you to have a big roach at your main sail leech. Also a square top sail is possible.
by Mika Harju
Fri 22 Nov 19, 8:50
Forum: Rig/Sail issues concerning all DFs
Topic: What is this parts in the Boom?
Replies: 14
Views: 7922

Re: Where are all the photos?

Just wait. It is not possible to add attachments by yourself.

See the instructions from here:
faq.php?sid=00a411608e652747e644efc9c848f98c#14
by Mika Harju
Thu 21 Nov 19, 17:48
Forum: Rig/Sail issues concerning all DFs
Topic: What is this parts in the Boom?
Replies: 14
Views: 7922

Sorry I have misunderstood you. I was talking about boom outhauling arrangement, ie. how to move the boom left-right direction. :oops: See red rope in attached PDF. Anyhow I do not have any main sail outhauling system. I have removed the boom aft end fitting completely because it is useless. I have ...
by Mika Harju
Thu 21 Nov 19, 13:04
Forum: Rig/Sail issues concerning all DFs
Topic: What is this parts in the Boom?
Replies: 14
Views: 7922

About Main Sail Outhaul: It is necessary and very important adjustment to control the flying shape of the sail, both main sail and jib. I do not use very often the traveller to control the main sail, but this outhauler system is used a lot. My updated system has a cleat, a becket block and a single ...
by Mika Harju
Thu 21 Nov 19, 12:44
Forum: Rig/Sail issues concerning all DFs
Topic: What is this parts in the Boom?
Replies: 14
Views: 7922

About Lazy Jack setup, see attached schematic (photo): 1- My DF1000R is equipped with a rotating mast and quite a big square top main sail. This setup does not work with a fixed mast because the padeyes P1 and P2 are too far from the center of the mast. 2- There are two ropes, R1Left and R1Right, co...
by Mika Harju
Wed 20 Nov 19, 9:05
Forum: HULL issues concerning all DFs
Topic: What part is this under the Aka?
Replies: 2
Views: 3033

Re: What part is this under the Aka?

When folding in it is a stopper for the ama preventing it to go too close to the main hull.
by Mika Harju
Wed 20 Nov 19, 9:03
Forum: Rig/Sail issues concerning all DFs
Topic: What is this parts in the Boom?
Replies: 14
Views: 7922

Re: What is this parts in the Boom?

I use those for Lazy Jacks in my DF1000R
by Mika Harju
Sat 26 Oct 19, 11:34
Forum: Motor/Equipment/Electrics issues concerning all DFs
Topic: Solar cells on amas
Replies: 5
Views: 4891

Re: Solar Cells on Amas

Hi Steve Referring your LiFePO4 batteries how have you prevented to overcharge those when you have several ways to charging? Solar cells, inboard engine alternator, shore power charger, hydro generator, wind generator etc... Few questions: 1-What kind of battery management unit(s) do you have? 2-How...
by Mika Harju
Wed 18 Apr 18, 9:12
Forum: General
Topic: replacement nets
Replies: 6
Views: 5956

Re: More nets

If anyone needs Cad or PDF drawings of DF1000 nets just ask. I do not have those front triangular nets on mine.
by Mika Harju
Tue 28 Nov 17, 17:03
Forum: DF920 Hull
Topic: Rudder failure
Replies: 5
Views: 7608

Re: Did it!

I think the DF920 is similar to my DF1000.
Yes, you need to remove the bottom plate to get the rudder fixture out. It is quite easy. Just remove the nuts from inside.

I'll send a couple of photos to be attached here
by Mika Harju
Mon 04 Sep 17, 6:51
Forum: HULL issues concerning all DFs
Topic: replacement pivot point "bearing plates" on the am
Replies: 1
Views: 3811

Re: replacement pivot point "bearing plates" on th

Teflon PTFE sheet is the right material for these. UV resistance is good and it is low-friction. Nylon is NO good because of UV.

UV-resistance:
https://www.directplastics.co.uk/how-uv ... stics.html

Material:
https://www.directplastics.co.uk/ptfe-sheet
by Mika Harju
Tue 11 Jul 17, 12:11
Forum: DF1000 General Topics
Topic: Measurements of the interior
Replies: 4
Views: 4611

Re: Measurements of the interior

Just wait...
Bo is the only person who is able to add files here. He'll do it later...
:D
by Mika Harju
Mon 12 Jun 17, 9:58
Forum: DF1000 Rig/Sails
Topic: High Tech sail set
Replies: 6
Views: 10012

Re: front sail genoa

Mine is DF1000R equipped with taller rotating mast. Mast profile length is 15008 mm. Attached a drawing of my jib and mast. If you need a ready designed 3D IGES file of the jib for your sailmaker just let me know. Please click on the photo to see it enlarged! http://www.dragonfly-trimarans.org/image...
by Mika Harju
Thu 01 Jun 17, 7:18
Forum: DF35 Hull
Topic: Rudder downhaul cable
Replies: 6
Views: 6322

Take a look at this topic: http://dragonfly-trimarans.org/phpBB/viewtopic.php?t=690 I bought it from Canada, CCI Competition Composites Inc http://www.fastcomposites.ca/site/marine/foils-a-z/dragonfly/ I can not recommend this factory . I designed the rudder blade and they made load calculations and...
by Mika Harju
Wed 31 May 17, 10:34
Forum: DF35 Hull
Topic: Rudder downhaul cable
Replies: 6
Views: 6322

In DF1000 there are no sharp edges to chafe the rope. My rope is over sized Dyneema SK75 diameter 5mm without overbraid , Brummelman splicings on the both ends. I am replacing it with a new one every 2nd year. My rudder is a One-Off without any fitting for the rope, just a hole near the leading edge...
by Mika Harju
Tue 30 May 17, 9:18
Forum: DF35 Hull
Topic: Rudder downhaul cable
Replies: 6
Views: 6322

Re: Rudder downhaul cable

Why not Dyneema?
I have had Dyneema downhauler for years now without any problems.
by Mika Harju
Wed 24 May 17, 8:19
Forum: DF1000 Hull
Topic: Rain leak near mast
Replies: 18
Views: 17483

Re: Rain Leak Near Mast

This is really good news. Thank you for the update. So finally the leak was not from mast base as I (and you) thought. I have struggled with this same problem for years. I have just yesterday finished varnishing job to saloon bulkhead. Now I'll focus to companionway hatch. It would be really nice to...
by Mika Harju
Fri 17 Feb 17, 12:08
Forum: DF32 General Topics
Topic: DF32S Rig dimensions and 3D model
Replies: 0
Views: 5100

DF32S Rig dimensions and 3D model

I am drawing a 3D model of DF32 Supreme rig and mast to design a sail set for it in co-operation with sailmaker. Now I am missing the dimension for mast rake and bend, does anyone know the right dimensions? There is 7cm value for bend in User's Manual but I have not measured it by myself. All additi...
by Mika Harju
Fri 10 Jun 16, 9:29
Forum: Rig/Sail issues concerning all DFs
Topic: Replacement Mainsail
Replies: 8
Views: 8467

My racing laminate main from Gransegel is into season 13 now and still competitive - with a lot of care, some repairs and carbon fibre tape. I have had three High Tech membrane sails from Gransegel. Technora/Carbon yarns and no taffeta. The first jib broke down after 2000NM and one season, Mats mad...
by Mika Harju
Fri 10 Jun 16, 9:29
Forum: Rig/Sail issues concerning all DFs
Topic: Replacement Mainsail
Replies: 8
Views: 8467

My racing laminate main from Gransegel is into season 13 now and still competitive - with a lot of care, some repairs and carbon fibre tape. I have had three High Tech membrane sails from Gransegel. Technora/Carbon yarns and no taffeta. The first jib broke down after 2000NM and one season, Mats mad...
by Mika Harju
Mon 06 Jun 16, 10:37
Forum: DF1000 Rig/Sails
Topic: Ronstan (Frederiksen) 19 series batten car system spares
Replies: 0
Views: 5596

Ronstan (Frederiksen) 19 series batten car system spares

Problems with Ronstan RC11966 batten cars. The ballway of End Cap 891858 is worn out and the balls does not roll nicely any more. They are jammed to each other and the car does not move smoothly. I have tried to find spare parts, but nothing yet. Any help? Please click on any of the photos to see th...
by Mika Harju
Mon 23 May 16, 13:58
Forum: DF1000 General Topics
Topic: CAD drawings
Replies: 6
Views: 7910

Re: CAD drawing modification

Done
by Mika Harju
Mon 23 May 16, 13:26
Forum: DF1000 General Topics
Topic: CAD drawings
Replies: 6
Views: 7910

Re: CAD drawing modification

[/quote] According to my measurements the width of the centre hull is 2745mm so it is too much for trailering. The measured weight of my DF is 3119kg. There was one Italian DF1000 for sale a couple of years ago with a special trailer equipped with hydraulic system to rotate the hull around the cente...
by Mika Harju
Mon 31 Aug 15, 7:23
Forum: General
Topic: second Dyneema failure
Replies: 2
Views: 5300

Re: second Dyneema failure

I think that if Dyneema has compression damage and the cover gets minor damage, the rope is shot! Even a little UV kills the dyneema fibers inside. Dyneema has excllent UV resistance. This is from Dyneema Technical Specification: Optical properties. Dyneema® fi bers are visually opaque. The fi ber ...
by Mika Harju
Mon 31 Aug 15, 7:09
Forum: DF800 Rig/Sails
Topic: Elvström main sail
Replies: 4
Views: 5517

Hi ! Why do You want an Elvstrøm ? Check also Ullman Denmark, they have a very good designer, Lars Bo, who does some really good sails, to a fair price. Hi Check also Gran Segel Sweden, they have a very good designer, Dragonfly sailor Mats Johansson, who does some really good sails, to a fair price...
by Mika Harju
Mon 31 Aug 15, 7:03
Forum: DF35 General Topics
Topic: Supports for dry winter storage DF35
Replies: 4
Views: 6164

It does not absorb water. It is dock buffer and sold by a local dealer in Finland. You should find it closer :D
http://tuotteet.etra.fi/en/g19561418/dock-buffers
by Mika Harju
Tue 25 Aug 15, 11:22
Forum: DF35 General Topics
Topic: Supports for dry winter storage DF35
Replies: 4
Views: 6164

Re: Supports for dry winter storage DF35

I hope these photos will help you. Works fine with DF1000. Just for your information: http://dragonfly-trimarans.org/phpBB/viewtopic.php?t=20 Please click on any of the photos to see them enlarged! http://www.dragonfly-trimarans.org/images1000/ws1_s.jpg http://www.dragonfly-trimarans.org/images1000/...
by Mika Harju
Wed 10 Jun 15, 8:20
Forum: Rig/Sail issues concerning all DFs
Topic: Waterstays
Replies: 9
Views: 9564

Re: Update 9Jun2015

TC wrote:Not trying to drive traffic to my blog, but it is easier to post a link....

So: http://skeelsrinehart.blogspot.com/2015 ... art-1.html
Great, thank you for this information :D
by Mika Harju
Fri 05 Jun 15, 8:12
Forum: Rig/Sail issues concerning all DFs
Topic: Main halyard block failure (2:1 purchase)
Replies: 8
Views: 9474

Thanks, but how do you attach the block to the mainsail headboard -- with a rope shackle? Rope shackle is too long and slow to operate on top square main when you need to release the top quickly to get it down. My setup is a Wichard fixed eye quick shackle and dyneema lashing. http://marine.wichard...
by Mika Harju
Wed 03 Jun 15, 7:51
Forum: Rig/Sail issues concerning all DFs
Topic: Main halyard block failure (2:1 purchase)
Replies: 8
Views: 9474

Mika, does your Dyneema halyard not slip through the clutch? (which do you have -- Easylock or Spinlock?) The Karver block look neat -- do you have a pic of how you attach it to the sail? Does the halyard not get out of the groove when the rope is loose? The Dyneema rope works fine with my Easylock...
by Mika Harju
Mon 01 Jun 15, 7:46
Forum: Rig/Sail issues concerning all DFs
Topic: Main halyard block failure (2:1 purchase)
Replies: 8
Views: 9474

Re: Main halyard block failure (2:1 purchase)

I will need to get a new block and new halyard, as that is likely also damaged. (the set-up of halyard, block, shackle had been in use for years) Did anyone have a similar experience? Any clue what the 2:1 block load capacity should be on a DF35 (65m2 sail)? There are also 2:1 shackles from Tylaska ...
by Mika Harju
Tue 17 Feb 15, 11:16
Forum: HULL issues concerning all DFs
Topic: Rudder chassis support bar. How to remove it?
Replies: 1
Views: 4134

Re: Rudder chassis support bar. How to remove it?

No problem. It was easy to remove and there needs to be a non rotating plate with M10 thread inside.
by Mika Harju
Thu 12 Feb 15, 20:13
Forum: HULL issues concerning all DFs
Topic: Rudder chassis support bar. How to remove it?
Replies: 1
Views: 4134

Rudder chassis support bar. How to remove it?

There is a welding failure on my rudder chassis so I need to remove it. The lower support bar is installed with three M10 screws. Two at the front are welded to the steel bar and the nuts are inside, but my problem is the third one at the stern. There is a M10 hexagon head screw but I do not know is...
by Mika Harju
Thu 11 Dec 14, 14:27
Forum: DF1000 General Topics
Topic: Performance difference between rotating & non rotating m
Replies: 4
Views: 6314

Re: rotating mast

Attached is a CAD drawing of my mast in PDF format. I hope there is all information you need.

DF1000R-8RigAssyV4Date051214.pdf
by Mika Harju
Tue 11 Nov 14, 16:09
Forum: DF1000 General Topics
Topic: Performance difference between rotating & non rotating m
Replies: 4
Views: 6314

Re: Performance difference between rotating & non rotati

I Purchased a DF 1000 with a 15 meter non-rotating mast. Can anyone tell me the performance I would expect to achieve if the mast was made to rotate? From sail engineering point of view a rotating mast is a part of sail and a standing mast just adds drag. For example Multi 2000 rating number adds r...
by Mika Harju
Wed 18 Jun 14, 6:32
Forum: Motor/Equipment/Electrics issues concerning all DFs
Topic: Beware of boat heaters from Turkey
Replies: 0
Views: 5668

Beware of boat heaters from Turkey

I bought too cheap Eberspacher Airtonic D4 diesel heater from Turkey a couple of weeks ago. When installed the heater did not start at all. After double checking all external connections I took a look inside the heater. All connectors were open and heat exchanger was assembled totally wrong way. The...
by Mika Harju
Tue 03 Jun 14, 12:01
Forum: Motor/Equipment/Electrics issues concerning all DFs
Topic: DF 1000 RAIN LEAK FINALLY FIXED !!
Replies: 4
Views: 6086

Re: DF 1000 RAIN LEAK FINALLY FIXED !!

[/quote]
Congratulations, I am still fighting with the same problem. This is my 4th year so I have still long way to go... :oops:
by Mika Harju
Wed 29 Jan 14, 6:46
Forum: DF1000 Hull
Topic: How to remove the daggerboard
Replies: 0
Views: 6707

How to remove the daggerboard

Next step is to upgrade the daggerboard. 8)
Has anyone removed it from DF1000? Is the system similar to DF800 where there is a locking screw near the pivot point and the pivot axis is fixed?
Any photos available of the removed rudder and box?